Introducing the revamped YY Plasfun EVO Belay glasses, offering a blend of light, durable plastic frames and enlarged BK7 prisms for a broader, more comfortable view. Suitable for both climbers and glasses wearers, these versatile glasses are highly adjustable, ensuring a perfect fit for every face shape. Ideal for extended rock-climbing activities like sport and top roping, they provide exceptional quality without compromises. Functioning like a periscope, these glasses allow belayers to see directly up, preventing neck strain and 'Belayer's Neck', thereby enhancing concentration and belaying performance.