1680D nylon with water-resistant coating and weather-tight zippers. The bags are fully lined with nylon and padded with foam to retain shape and offer protection for your rear. CANTLE POCKET The cantle pocket fits the curve of most western and endurance saddles, securely attaches to the front saddle rigging with adjustable straps and has brass grommets for saddle string attachment. Snug attachment guarantees that the bags will not shift. 21"L x 41/2"H x 6"D.