Description: Large area of “Shark Gill” air vent makes the goggle breath freely and more comfortable with long time wear. Indirect vent holes offer better safety and decrease the risk of chemical splash and particulates into eyes Extended design of the nose pad leads to better comfort and fit. Widened head band with elastic nylon can reduce the pressure to head and maintains excellent flexibility comfort for long term use. Can be worn over normal glasses as an OTG. Shipping: It usually take 7 - 15 days for delivery to US mainland by DHL eCommerce (differ to DHL). To other countries would around 2 - 3 weeks. Sorry we don't ship to Canada, Maxico, Colombia, and Gibraltar due to tracking issue. Return Policy: For any reason if you don't like the item, you could return it within 7 days since receiving for refund of your purchasing cost. Please make sure the return item is in original condition (New in Original Package). And please understand that return postage is on buyer's cost and the shipping fee is not refundable as it's paid to the shipping company.