Ergodyne's ProFlex winter work gloves have 40 grams of 3M Thinsulate™ insulation with a Hipora waterproof and windproof liner. A high qualtiy glove at a great price! Nylon spandex cuff with hook and loop closure with a breathable spandex back. PVC reinforced palm and fingers. Foam knuckle pad, terry thumb brow wipe. Amara synthetic leather. Machine washable.