2.1 Clothing Fencing clothing includes the jacket, pants, plastron (underarm protector), and socks. Some companies manufacture unitards (combined jacket and pants). Inexpensive practice gear is fashioned of synthetics or heavy cotton, but competition clothing is required to pass an 800 N puncture test. Casual and beginner fencers can rely on cotton or synthetic jackets, but should consider using a plastron for extra protection. Track pants or baseball knickers are also thrifty alternatives to genuine fencing clothing. Most jackets are left- or right-handed. Women's jackets are not only cut differently, but have pockets for breast protectors. Ambidextrous (back-zip) jackets are available, but generally not with homologated fabrics. Ambidextrous (double-sided) plastrons are available from some manufacturers. Knee-high sport socks (such as for soccer/football or baseball) can be purchased from most sporting goods stores. Skin should not show between the socks and pant legs nor the cuff and glove of the weapon hand. The trailing hand and back of the head should be the only areas of exposed skin on the fencer's body.