Boys Thermal Underwear Winter Warm Lined Thermal Base Layer Top and Bottom Pajamas for Kids Soft Comfortable Thermal Wear for Cold Weather Indoor Outdoor Activities Material: Polyester Color: as the picture shows, (Due to the difference between different monitors, the picture may have slight color difference. please make sure you do not mind before ordering, Thank you!) Package weight: 370g Package size: 0x0x0cm,(Please allow 1-3mm error due to manual measurement. please make sure you do not mind before ordering.) Size chart: Size:100 Recommended age:3-4 Years Bust:28cm/11.02'' Waist:42cm/16.54'' Sleeve:34cm/13.39'' Length:41cm/16.14'' Bottoms Length:58cm/22.83'' Size:110 Recommended age:4-5 Years Bust:30cm/11.81'' Waist:44cm/17.32'' Sleeve:37cm/14.57'' Length:44cm/17.32'' Bottoms Length:64cm/25.20'' Size:120 Recommended age:5-6 Years Bust:32cm/12.60'' Waist:46cm/18.11'' Sleeve:40cm/15.75'' Length:47cm/18.50'' Bottoms Length:69cm/27.17'' Size:130 Recommended age:6-8 Years Bust:34cm/13.39'' Waist:48cm/18.90'' Sleeve:44cm/17.32'' Length:50cm/19.69'' Bottoms Length:74cm/29.13'' Size:140 Recommended age:8-10 Years Bust:36cm/14.17'' Waist:50cm/19.69'' Sleeve:47cm/18.50'' Length:53cm/20.87'' Bottoms Length:79cm/31.10'' Size:150 Recommended age:10-12 Years Bust:38cm/14.96'' Waist:52cm/20.47'' Sleeve:50cm/19.69'' Length:56cm/22.05'' Bottoms Length:85cm/33.46'' Size:160 Recommended age:12-14 Years Bust:40cm/15.75'' Waist:54cm/21.26'' Sleeve:53cm/20.87'' Length:59cm/23.23'' Bottoms Length:90cm/35.43'' Size:165 Recommended age:14-15 Years Bust:42cm/16.54'' Waist:56cm/22.05'' Sleeve:57cm/22.44'' Length:62cm/24.41'' Bottoms Length:95cm/37.40'' Size:170 Recommended age:15-16 Years Bust:44cm/17.32'' Waist:58cm/22.83'' Sleeve:60cm/23.62'' Length:64cm/25.20'' Bottoms Length:98cm/38.58'' Size:175 Recommended age:16-17 Years Bust:46cm/18.11'' Waist:60cm/23.62'' Sleeve:63cm/24.80'' Length:66cm/25.98'' Bottoms Length:101cm/39.76'' Size:180 Recommended age:17-18 Years Bust:48cm/18.90'' Waist:62cm/24.41'' Sleeve:66cm/25.98'' Length:69cm/27.17'' Bottoms Length:105cm/41.34'' 【SIZE SELECT】Due to the varying sizes of each product, in order for you to choose the accurate and suitable size, please refer to the size chart in the product image instead of the platform's "Size Guide" to select the size. This thermal underwear set is crafted from a soft -lined fabric, providing exceptional warmth and comfort for boys during cold autumn and winter months, ideal for both indoor lounging and outdoor adventures. Features a classic crew neck top and matching bottoms designed as cozy pajamas, with playful stripes, cute letters, and colorful prints for a and stylish that kids. The versatile base layer set is for various daily activities including casual wear, school, and leisure, offering a comfortable fit that pairs easily with different outfits. Designed for boys 3 to 18 years, this thermal wear a soft, comfortable fit suitable for all-day wear during chilly weather, promoting freedom of movement.