We choose dense and tightly woven fabrics, skin-friendly two-layer fabric construction, reinforce seams with strong stitching, and use a tight-sealing Buckle closure mechanism with straps to more secure. This helps maintain oil content and prevent leakage during use EXTRA ELASTIC EXTENSIONS: The adjustability of the wide elastic extensions allows you to find the perfect level of tightness and comfort. You can adjust it to fit your body size and shape, ensuring a personalized experience. The extension part adopts a widened design to prevent the Buckle from scratching the skin during use. Pack Back Pad: High-quality materials, soft, reusable, 3 thickness, highly absorbent. Zipper pocket for hot and cold packs: For enhanced oil absorption, you can put hot/cold packs in the zipper pockets if needed. Apply heat for 30-60 minutes or overnight, making sure the heat is comfortable and not too intense. For cold packs, you can leave the pack on for 20-30 minutes. pack treatments can be done 2-3 times per week. Material: cotton colour: khaki Package Contents: 1 x 1 x Buckle style neck bag 1 x replacement pad 18cm wide 1 x extension strap 5cm wide Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.