Kimlee Water-resistance Travel Backpack Hiking Daypack Camping Backpack for Outdoor Sports,35L Blue, water resistant 400*800D nylon and polyester material Cool mesh padded back Removable relieve stress system reduce your shoulder's pressure Approximate Size: L12.6"*H20.1"*W7.1" & Weight: about 2.68 pounds; Unisex, Both for women and men Cool mesh padded back