Time to get outside. The sun is warm and the days are longer. So go for a day hike, hit the trail on the mountain bike, or get serious about bagging a couple of summits.

To help you in your outside endeavors, GearGuide took a look at three roll-top backpacks. We love the versatility of the roll-top — these products can expand beyond the capacity of their more traditional lidded and zippered brethren, and compress down to fit much smaller loads. And the unique designs of the three products we tested provide even more innovation including advanced ventilation and carrying systems, waterproof/airtight approaches, and put-it-in-your-pocket compactness.

Here are the three:

Boreas BolinasBoreas Bolinas – San Francisco-based Boreas delivers a fully featured daypack in the Bolinas. The unique external frame and ventilation system make this pack standout. See review.

Ourdoor Research Dry Peak BaggerOutdoor Research Dry Peak Bagger – Waterproof and amazingly airtight, the Dry Peak Bagger was the lightest in our test at nine ounces. See review.

Sierra Designs Summit SackSierra Designs Summit Sack – This 12 ounce wonder collapses into its own internal pocket for easy storage when not in use. It includes ventilated shoulder straps, sternum strap and a waist belt. See review.

Thanks for reading another outdoor gear review from GearGuide. And thanks to Boreas, Outdoor Research and Sierra Designs, along with ECHOS Communications and Verde PR for providing product for this review.