For Fitbit Charge 3/Charge 3 SE/Charge 4 Stylish Watch Band Pearl+Nylon Woven Replacement Wrist Strap - Blue Made of skin-friendly woven nylon + pearl material, which is breathable, soft and elastic, comfortable to wear With an adjustment design, the size can be adjusted according to the wrist An ideal replacement watch strap for your old, broken one Easy to install and remove Specifications: Material: Woven nylon+pearl Wrist circumference: 5.5 - 8.1inch Compatible with: Fitbit Charge 3/Charge 3 HR/Charge 4 Package included: 1 x Watch Band Watch Not Included