The Boss has an innovative thick design which makes for more intense stroking and easier grip. Its internal ribs and nubs gives the user extra stimulation. The air hole design on the tip makes for a more comfortable fit and easy use, just pull tightly over your penis to remove air from the inside. Pour some lube on the inside and outside before use. The Boss is made of SilaSkin, which is a perfect mix of Silicone and TPR which gives it an unbelievable stretch factor. The widest external diameter is 2.5 inches and the full length is 6.5 inches which stretches to fit most guys of any shape and size. The Boss is available in blue and is safe with water based lubes. Wash thoroughly with mild soap and water. Remember, this is not a contraceptive or a substitute for a condom. This product is not compatible with latex products.