Home
- Camp/Hike
  - Sleeping Bags
    - Sleeping Bag Liners
      - Sea To Summit Reactor Thermolite Sleeping Bag Liner

The North Face - Killer deals up to 50% off.

Sea To Summit Reactor Thermolite Sleeping Bag Liner

Sea To Summit Reactor Thermolite Sleeping Bag Liner

Item #STS0004|8 in Stock – Ships Wicked Fast

4 Reviews - Testify

Q & A | Ask away, Sherlock.

100% Guaranteed

close Unconditional 100% Guarantee

We guarantee complete satisfaction and an unlimited lifetime warranty. If at any time - now, next month, in 30 years - you're not 100% satisfied, send your gear back for a full refund. No questions asked.
Need help returning an item? - Click Here close
Global Shipping Info

close Brand Notice

Due to contracts with the following brands, we are unable to ship any of their products outside the US. more...

Int'l Shipping

Backcountry.com uses UPS Worldwide Express or Worldwide Expedited for all shipping outside the United States. We have found this method to be quick, secure, and cost effective.
close
Pass It On

Sea To Summit Reactor Thermolite Sleeping Bag Liner

The Sea To Summit Reactor Thermolite Sleeping Bag Liner weighs only 9.2 ounces, adds up to 15 degrees to your sleeping bag's warmth, and packs to a tiny 3 x 5 inches. The key to this Sea To Summit sleeping bag liner's excellent stats is warm, breathable hollow-fiber Thermolite material. This sleeping bag liner weighs less and packs smaller than a comparable fleece liner, which makes it ideal for both backpacking and nights in the hostel.

Bottom Line: Sleep warmer and more comfortably thanks to the soft Sea To Summit Reactor Thermolite Sleeping Bag Liner.

Product Wall

Ask Questions. Write Reviews. Give Answers.

Other Gear Freaks are looking at this product, too. So ask 'em questions. Give your insight. Get street cred.

Hi, throw your review on the Product Wall to show your Gear-telligence.

Hi, got a question? Ask on the Product Wall.

works, but I'm not convinced it's the best

By: dnr
April 24, 2007

Essentially this is a giant polyester sock. It feels quite thin (you can see through it if you hold it up to light). I don't know about 15 degrees, but it did add a noticeable amount of warmth to my 30 degree bag on a cold night. The drawstring comes out on the left by default but with a little effort I moved it to the right. I didn't feel like it inhibited motion in my sleeping bag, and it was relatively easy to get in and out of. It may be a little heavy (and expensive) for what it does. After all, it won't be as efficient as down for its weight. If you bring it and don't need it, at least it makes a decent pillow.

Was this helpful? (36) (6)

<form class="provide_answer_form" method="post" onsubmit="return false;" action="#">
		<span class="flag_close" onclick="BCNTRY.wall.PDP.close_dialog_onclick(this)"><a href="#" onclick="return false;"><img src="http://akamai.backcountrystore.com.edgesuite.net/images/bcs/pdp/flag_close.gif" alt="Close the answer form" class="flag_close"/></a></span>
		<input type="hidden" name="question_id" value="${question_id}" />
		<input type="hidden" name="answer_edit" value="1" />
		<h3>Impart your wisdom.</h3>
		<div class="error_message"></div>
		<div class="textarea_container">
  		<textarea name="answer_content" onkeyup="BCNTRY.wall.PDP.answer_content_onkeyup(this.form)" onfocus="BCNTRY.wall.PDP.answer_content_onfocus(this)">${content}</textarea>
		</div>
		<input type="image" src="http://akamai.backcountrystore.com.edgesuite.net/images/bcs/buttons/answer_it.gif" alt="Submit Answer" onclick="BCNTRY.wall.PDP.answer_question_onclick(this.form)" class="answer_it_button" />
		<span class="answer_chars"></span>
	</form>

{if display == 'flagged'}
		<div class="question">
			<div class="question_text"><span onclick="BCNTRY.wall.PDP.view_flagged_question_onclick(this, '${question_id}')"><a href="#" onclick="return false;">${flagged_description}</a></span></div>
			<div class="question_by"> </div>
			{if messaging.question}<div class="qanda_question confirmation">${messaging.question}</div>{/if}
			{if messaging.answer}<div class="qanda_answer confirmation">${messaging.answer}</div>{/if}
		</div>
	{else}
	<div class="question">
		<h3><a href="${qanda_link}">${title}</a></h3>
		<div class="question_text"><p>${body}</p></div>
		<div class="question_by">
			<p>By: <a class="user_profile_link" href="${user.profile_url}">${user.display_name}</a>
					<a class="user_profile_link" href="${user.profile_url}"><img class="minipro_icon" src="http://akamai.backcountrystore.com.edgesuite.net/images/bcs/profile/minipro_icon.gif" alt="" /></a>
					<br />${date}</p>
		</div>
		<p class="question_options">
			{if user.id == curr_user.id}<span class="editq_link"><span onclick="BCNTRY.wall.PDP.edit_question_onclick(this, '${question_id}')"><a href="#" onclick="return false;">Tweak This</a></span></span>{/if} 
			{if flagged}
			<span class="flag_link"><span onclick="BCNTRY.wall.PDP.unflag_question_onclick(this, '${question_id}')"><a href="#" onclick="return false;">Un-Flag</a></span></span>
			<div class="error_message"></div>
			{else}
			<span class="flag_link"><span onclick="BCNTRY.wall.PDP.flag_question_onclick(this, '${question_id}')"><a href="#" onclick="return false;">Flag</a></span></span>
			{/if}
		</p>
		{if messaging.question}<div class="qanda_question confirmation">${messaging.question}</div>{/if}
	</div>
		{if answer != null}
			<div class="answer">
			{if answer.display == 'flagged'}
				<div class="answer_text"><span onclick="BCNTRY.wall.PDP.view_flagged_question_onclick(this, '${question_id}')"><a href="#" onclick="return false;">${answer.flagged_description}</a></span></div>
				<div class="answer_info"> </div>
			{else}
				<div class="answer_text"><p>${answer.body}</p></div>
				<div class="answer_info">
					<p>By: ${answer.display_users}<br />${answer.date}</p>
				</div>
				<p class="answer_options">
					<span class="improve_link"><span onclick="BCNTRY.wall.PDP.improve_answer_onclick(this, '${question_id}')"><a href="#" onclick="return false;">Tweak This</a></span></span>
					{if answer.flagged}
						<span class="flag_link"><span onclick="BCNTRY.wall.PDP.unflag_answer_onclick(this, '${question_id}')"><a href="#" onclick="return false;">Un-Flag</a></span></span>
                        <div class="error_message"></div>
					{else}
						<span class="flag_link"><span onclick="BCNTRY.wall.PDP.flag_answer_onclick(this, '${question_id}')"><a href="#" onclick="return false;">Flag</a></span></span>
					{/if}
				</p>
			{/if}
			{if messaging.answer}<div class="qanda_answer confirmation">${messaging.answer}</div>{/if}
			</div>
		{/if}
	{/if}

<div class="flag_container">
		<form class="flag_as_offensive" method="post" onsubmit="return false;" action="#">
			<input type="hidden" name="question_id" value="${question_id}"/>
			<span class="flag_close" onclick="BCNTRY.wall.PDP.close_dialog_onclick(this)"><a href="#" onclick="return false;"><img src="http://akamai.backcountrystore.com.edgesuite.net/images/bcs/pdp/flag_close.gif" alt="Close the flagging form" class="flag_close"/></a></span>
			<h4>Something rub you the wrong way?</h4>
			<p>Thanks for pointing it out. We'll send it immediately to our clean up crew. If you don't mind pointing us in the right direction...</p>
			<div class="error_message"></div>
			<h5>This post was:</h5>
			<p>
				
				<span><input type="checkbox" name="flag" value="1" /> Offensive</span>
				
				<span><input type="checkbox" name="flag" value="2" /> Spam</span>
				
				<span><input type="checkbox" name="flag" value="3" /> Miscategorized</span>
				
				<span><input type="checkbox" name="flag" value="4" /> Duplicate</span>
				
			</p>
			<input class="save_question" src="http://akamai.backcountrystore.com.edgesuite.net/images/bcs/buttons/save_qa.gif" type="image" onclick="BCNTRY.wall.PDP.flag_question_submit_onclick(this.parentNode)" />
		</form>
	</div>

<h4>Something rub you the wrong way?</h4>
			<p>Thanks for pointing it out.</p>
			<div class="error_message"></div>
			<h4>Edit this post yourself:</h4>
			<div class="textarea_container">
			  <textarea name="answer_content" onkeyup="BCNTRY.wall.PDP.answer_content_onkeyup(this.form)" onfocus="BCNTRY.wall.PDP.answer_content_onfocus(this)">${content}</textarea>
		  </div>
			<span class="answer_chars"></span>

<h5 id="flag_edit">Or... let others do the dirty work.</h5>
			<p>This post was:</p>
			<p>
				
				<span><input type="checkbox" name="flag" value="1" /> Offensive</span>
				
				<span><input type="checkbox" name="flag" value="2" /> Spam</span>
				
				<span><input type="checkbox" name="flag" value="3" /> Miscategorized</span>
				
				<span><input type="checkbox" name="flag" value="4" /> Duplicate</span>
				
			</p>
			<div class="clearb"></div>

<form name="rev${review_id}" id="rev${review_id}" method="post" action="http://www.backcountry.com/store/STS0004/Sea-To-Summit-Reactor-Thermolite-Sleeping-Bag-Liner.html">
		<input type="hidden" value="${review_id}" name="review_id" />
		<input type="hidden" value="${link_id}" name="link_id" />
		<input type="hidden" value="" name="helpful_review" />
		${rank_image}
		<h3><a href="${review_link}">${review_title}</a></h3>
		<p>By: <a class="user_profile_link" href="${user_profile_url}">${user.display_name}</a>
				<a class="user_profile_link" href="${user_profile_url}"><img class="minipro_icon" src="http://akamai.backcountrystore.com.edgesuite.net/images/bcs/profile/minipro_icon.gif" alt="" /></a>
				<br /><span class="review_date">${date}</span></p>
		<div class="review_text"><p>${body}</p></div>
		<div class="review_helpfulness">
		<p>Was this helpful? <a href="#" onclick="readReview('rev${review_id}', true, '${link_id}'); return false;"><img src="http://akamai.backcountrystore.com.edgesuite.net/images/bcs/pdp/thumbs_up.gif" alt="Yes" /></a> (${helpful_count}) <a href="#" onclick="readReview('rev${review_id}', false, '${link_id}'); return false;"><img src="http://akamai.backcountrystore.com.edgesuite.net/images/bcs/pdp/thumbs_down.gif" alt="No" /></a> (${unhelpful_count})</p>
		</div>
	</form>

Tech Specs:

Material:	Thermolite
Shape:	Mummy with boxed foot
Degrees Added:	15-degrees
Dimensions:	[Open] 35 x 82in; [rolled] 3 x 5in
Weight:	9.2oz (265g)
Recommended Use:	Backpacking, travel
Warranty:	1 Year

You might also dig...

Cocoon Poly-Cotton MummyLiner

$19.46

Cocoon Egyptian Cotton Mummy Liner

$26.96

Cocoon Cotton Travel Sheet - Kids'

$13.26

Clothing

Gear

Accessories

Sea To Summit Reactor Thermolite Sleeping Bag Liner

Please choose an option to order this item.

Sea To Summit Reactor Thermolite Sleeping Bag Liner

Product Wall

Worth the money

Hey, write a Review. Others want your opinion.

Got a question? Somebody out there has the answer.

works ok

pretty nice

works, but I'm not convinced it's the best

Tech Specs:

You might also dig...