Fleece is an excellent fabric choice when selecting onesie pajamas; however, not just any fleece will make great sleepwear. Big Feet Pajama fleece footed pajamas are made using premium100% polyester micro polar fleece. Micro polar fleece provides the soft warm comfy cozy qualities of polar fleece with less weight and better moisture wicking properties, making it perfect for sleepwear. Our fleece is a premium micro polar anti-pill fleece. Anti-pill fleece is a higher quality, more expensive fleece, that is more durable and resists pilling. Anti-pill fleece will not ball up (pill) or pull apart like non-anti-pill fleece will during wear or most noticeably during or after wash and dry cycles. Big Feet Pajama Co. micro polar anti-pill fleece pajamas are available in a variety of colors and prints for the entire family, and a few fleece hoodies for pets, making them the perfect choice for memorable family pictures. Premium Micro Polar Anti-Pill Fleece Soft Comfortable Cotton Rib Knit Collar and Cuffs Footed Onesie with Breathable No Slip Non Skid Soles Convenient Rear Drop Seat, Butt Flap, Trap Door, with Velcro Closure Matching Family Pajamas for Infant/Toddlers, Youth & Adults Lower Heating Costs wearing Warm Micro Polar Fleece Onesies Easy Care - Machine Wash & Tumble Dry - Will not Shrink, Fade or Pill Available Red, Navy, Green Camouflage - Hunting Hunter Camo Footed Pajamas with Classic Button Front for Men & Women in Unisex Sizes: Height (ft) / (cm) Weight (lbs) / (kgs) XS Up to 5'3" / 160 cm Up to 130 lbs / 59 kgs S Up to 5'6" / 168 cm Up to 150 lbs / 68 kgs M Up to 5'9" / 175 cm Up to 180 lbs / 82 kgs L Up to 6'0" / 183 cm Up to 210 lbs / 96 kgs XL Up to 6'4" / 195 cm Up to 240 lbs / 110 kgs XXL Up to 6’6” / 198 cm Up to 275 lbs / 125 kgs Please use this size chart as a basic guide. When height and weight show different