Greetings, Need a large dry bag to hold an AED (defibrillator) & Med Kit. Do you think the 30L bag is sufficient?

Tech Specs:

Material:

vinyl 

Dimensions:

[5L] 7 x 8 in; [10L] 8 x 14 in; [20L] 9 x 16 in; [30L] 11 x 19 in 

Volume:

[5L] 280 cu in; [10L] 620 cu in; [20L] 1170 cu in; [30L] 1950 cu in 

Backpack Straps:

no 

Closure:

roll-top 

Weight:

[5L] 6.5 oz; [10L] 10 oz; [20L] 14 oz; [30L] 1 lb 2 oz 

Recommended Use:

rafting, canoeing, backpacking 

Manufacturer Warranty:

lifetime