The A-2 flight jacket was originally invented for US Army pilots during World War II. It was often adorned with patches and insignias that the pilots themselves added. Removable sheepskin collar, 2 patch pockets with 2-way entry, ribbed waist and cuffs. 100% Cowhide Leather LEATHER WORKING GROUP Lining: 100% Nylon Padding: 100% Polyester Removable collar: sheepskin. Fabric details: Cotton.