STREAM TRAIL Breathable Daypack II Backpack 2 Window Mask and a gusset

and a gusset

5 diopter increments from -1

but with several key improvements

·         Durable silicone mouthpiece with comfortable fit

STREAM TRAIL Breathable Daypack II Backpack 2 Window Mask and a gussetA day pack that you can use for all seasons. BREATHABLE BACKPACK with lightweight, drip proof and breathable fabric. Made of a water permeable material that prevents sweat from the back and moisture from the outside from entering, and moisture inside to escape. By sealing from the inside after sewing, it is designed to further prevent liquid from entering the interior. While exhaling moisture in the bag due to the temperature difference between the