Home
- Camp/Hike
  - Tents
    - Bivy Sacks
      - Mountain Hardwear Rock Sack Bivy

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

Right Zip

Mountain Hardwear Rock Sack Bivy

Item #MHW0388|17 in Stock – Ships Wicked Fast & Free

2 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

Mountain Hardwear Rock Sack Bivy

The Mountain Hardwear Rock Sack Bivy is an ideal ultralight shelter for alpine and big-wall climbing. Small ledges in the mountains give you few options for setting up your shelter. With the Rock Sack Bivy, all you need is enough room to lay down. This pole-less shelter is made of ultralight Gore-Tex PacLite and weighs only 1lb 2oz. Two small zippered ports at the waist allow you to be tied in at either side, so you don't roll off your ledge at night. This Mountain Hardwear bivy sack also has a UVX window on the hood to keep the inside a little brighter and let you check the weather without opening your shelter.

Bottom Line: At only 1lb 2oz, the Mountain Hardwear Rock Sack Bivy weighs less than most jackets and lets you stay tied in at bivys.

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.

<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/MHW0388/Mountain-Hardwear-Rock-Sack-Bivy.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:	Gore-Tex PacLite
Poles:	No
Doors:	1 Zip opening at top
Floor Space:	87in long
Seam Sealed:	Yes
Bathtub Floor:	No
Ventilation:	Zipper
Packed Size:	13 x 4in
Weight:	1lb 2oz
Recommended Use:	Alpine and big-wall climbing
Warranty:	Lifetime

You might also dig...

Ortovox Gemini Single Bivy Sack

$61.95

Black Diamond Winter Bivy Sack

$119.95

Ortovox Gemini Double Bivy Sack

$82.95

Clothing

Gear

Accessories

Mountain Hardwear Rock Sack Bivy

Please choose an option to order this item.

Mountain Hardwear Rock Sack Bivy

Product Wall

Try it out in person first

Hey, write a Review. Others want your opinion.

Got a question? Somebody out there has the answer.

all right as emergency shelter

Tech Specs:

You might also dig...