EBIN's Wonder Lace bond Adhesive Spray Sensitive is formulated for anyone with sensitive skin. Our carefully created formula i intended to give a secure hold without irritation, Gentle enough for everyday wear. Weight stated on the spray bottle is the total weight which includes the gas, product and the bottle. Net WT. is 65 % of the total weight which is the weight of the product inside the bottle, because the maximum amount of VOC (Volatile Organic compound) to safely fill up the bottle is 65% of the total weight. To clarify, the cans are not filled to maximum capacity for your safety and the safety of others.[SENSITIVE] Specially formulated for those with sensitive scalp. No more worries about irritation under the scalp and hairline. You can put on your favorite wig with no damage.