The Philips Sonicare Original W2 Optimal Replacement Toothbrush Heads 4 Pack in White features medium and soft bristles, making it ideal for gentle yet effective cleaning. With a compact design and being part of the Philips Sonicare DiamondClean model, these brush heads are lightweight at 0.11 pounds and compatible with other Philips Sonicare products. This pack includes four replacement heads, ensuring you have a fresh toothbrush for an extended period of time.