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Sizes: M(7-9 years), L(10-12 years).100% Pure Silk - The Miracle of SilkAfter 4000 years, nature and science have joined forces to produce a silk garment, which can now help thermo-regulate the body's temperature. Silk is naturally incredibly soft, warm, breathable and extremely lightweight, and when combined with Terramar's exclusive EC2 Qwik-Dri electrostatic comfort control process Thermasilk EC2 makes the ideal natural garment for next-to-the-skin comfort. Stay dry, warm and comfortable in all cold weather with Thermasilk EC2 . Ideal for layering, travelwear and everyday use. The perfect solution for all cold weather uses. Silk interlock provides double knit warmth without bulk. Avg. wt. oz. Import.