Round bases with webbing pull handle on base * All stress points bar tacked & fabric edges overlocked * Note: seams are not tape-sealed; therefore this product is not waterproof - only water resistant * 2..5 L:/ 130 cu.in - 4" x 10" . 4 L / 240 cu. in - 4.5" x 12". 6.5 L / 430 cu. in - 6.5" x 13". 9 L / 580 cu. in - 7" x 15". 15 L / 960 cu. in - 8.5" x 17". 20 L / 1400 cu. in - 9.5" x 20". 30 L / 2080 cu. in - 10.5" x 24"