Works great with a Be Free filter and with the offset opening most of the larger debris can be trapped in the bottom corner. With the opening at the top it also makes filling and venting the air out easy. 4L doubles the volume of system I was using with a small increase in pack weight.
BAOFENG UV-5R5 Dual Band Two-Way Radio: 5W Power, VHF & UHF, Complete Kit with Large Battery (Camo)
57 Review
High Power Tri-Power Portable Baofeng UV-5R Two Way Radio for Ham Radio Enthusiasts
62 Review
Marshall Major IV wireless headphones, brown
95 Review
Black BAOFENG UV-5R Dual Band Two-Way Radio
68 Review
Stay Comfortable And Stylish With DASUTA Sweatbands For Women And Men
55 Review
Smart bracelet Xiaomi Mi Smart Band 6 CN, black
50 Review
Foxelli Wading Boots: Lightweight, Rubber Sole Fly Fishing Shoes For Men - Grey
47 Review
6 Pcs Reflective Bands: High Visibility Running Gear For Women Men - Safety Straps Bracelets For Running, Cycling & Walking
46 Review