Overview
Inspired by our Froyd optical frame, Kostin scales up the classic optical silhouette with a robust acetate frame and an optimized fit for use as a sunglass. The result is a rounded sun frame that’s timeless and versatile, with nuanced details like a keyhole bridge, split bar tack hardware, and flipped temple design. Kostin is available in our Recycled Black and our Bio acetate, for those that want style and sustainability.
Includes
Your Raen eyewear will come with a hard case and microfiber cleaning cloth.
![[Cava / Agave]](http://specseyewear.com/cdn/shop/files/100U233KOS-S656-48_800x_2c6f5de7-00a9-4b41-821f-b58b0825ea0d_{width}x.png?v=1732004671)
![[Cava / Agave]](http://specseyewear.com/cdn/shop/files/100U233KOS-S656-48_800x_2c6f5de7-00a9-4b41-821f-b58b0825ea0d_530x@2x.png?v=1732004671)
![[Cava / Agave]](http://specseyewear.com/cdn/shop/files/KOSTIN_FW23_Cava_Agave_L2_800x_4e9e8c07-1d2f-4849-95b7-b05e32a29a9c_{width}x.jpg?v=1732004671)
![[Cava / Agave]](http://specseyewear.com/cdn/shop/files/100U233KOS-S656-48_A1_800x_febf2189-0e1b-4e04-8b14-cedda7670d55_{width}x.png?v=1732004671)
![[Cava / Agave]](http://specseyewear.com/cdn/shop/files/100U233KOS-S656-48_A2_800x_bd551718-5a56-40c9-ae64-9b40a456a605_{width}x.png?v=1732004671)
![[Cava / Agave]](http://specseyewear.com/cdn/shop/files/KOSTIN_FW23_Cava_Agave_L1_800x_ba2c71c8-70f1-4359-91ea-f08797753a79_{width}x.jpg?v=1732004671)
![[Cava / Agave]](http://specseyewear.com/cdn/shop/files/KOSTIN_FW23_Cava_Agave_L3_800x_7c28073c-1e9e-41f2-9ee8-80562257712a_{width}x.jpg?v=1732004671)
![[Cava / Agave]](http://specseyewear.com/cdn/shop/files/KOSTIN_FW23_Cava_Agave_L4_800x_c178dfa6-4047-4069-a516-21bb8261cd36_{width}x.jpg?v=1732004671)
![[Cava / Agave]](http://specseyewear.com/cdn/shop/files/KOSTIN_FW23_Cava_Agave_L5_800x_6675fbd0-f52a-4cca-ad3a-046e7388238f_{width}x.jpg?v=1732004671)
![[Cava / Agave]](http://specseyewear.com/cdn/shop/files/KOSTIN_FW23_Cava_Agave_L6_800x_2cd17b15-7e9d-41ad-8e1e-c4556bcc86a7_{width}x.jpg?v=1732004671)
![[Twilight Polarized / Vibrant Brown Polarized]](http://specseyewear.com/cdn/shop/files/100U233KOS-S555-48_800x_e440e73d-e554-4eb4-a263-24bcfe55fb6f_{width}x.png?v=1732004671)
![[Twilight Polarized / Vibrant Brown Polarized]](http://specseyewear.com/cdn/shop/files/KOSTIN_FW23_Twilight_Polarized_Vibrant_Brown_Polarized_L3_800x_af2ed571-fe65-4b84-bfd8-5b07d73f5e22_{width}x.jpg?v=1732004671)
![[Twilight Polarized / Vibrant Brown Polarized]](http://specseyewear.com/cdn/shop/files/100U233KOS-S555-48_A1_800x_92c5d871-06f0-4fc5-8c41-37467c59e609_{width}x.png?v=1732004672)
![[Twilight Polarized / Vibrant Brown Polarized]](http://specseyewear.com/cdn/shop/files/100U233KOS-S555-48_A2_800x_f50e6a6b-041b-4cab-8000-d0903d91abcc_{width}x.png?v=1732004672)
![[Twilight Polarized / Vibrant Brown Polarized]](http://specseyewear.com/cdn/shop/files/KOSTIN_FW23_Twilight_Polarized_Vibrant_Brown_Polarized_L1_800x_24279b6a-ec2e-47a5-a94c-8199fc7bf739_{width}x.jpg?v=1732004672)
![[Twilight Polarized / Vibrant Brown Polarized]](http://specseyewear.com/cdn/shop/files/KOSTIN_FW23_Twilight_Polarized_Vibrant_Brown_Polarized_L2_800x_77da84b3-0f09-424b-8819-c6cc94b6a028_{width}x.jpg?v=1732004672)
![[Twilight Polarized / Vibrant Brown Polarized]](http://specseyewear.com/cdn/shop/files/KOSTIN_FW23_Twilight_Polarized_Vibrant_Brown_Polarized_L4_800x_a9c1a820-75c6-4ecd-af70-a002e6622e6a_{width}x.jpg?v=1732004672)
![[Twilight Polarized / Vibrant Brown Polarized]](http://specseyewear.com/cdn/shop/files/KOSTIN_FW23_Twilight_Polarized_Vibrant_Brown_Polarized_L5_800x_0ba80512-c47c-4e06-bb8f-5701645717f8_{width}x.jpg?v=1732004672)
![[Twilight Polarized / Vibrant Brown Polarized]](http://specseyewear.com/cdn/shop/files/fw23-kostin-product-3_800x_a7d3f86f-6c33-4193-a706-cdc633de3ba9_{width}x.jpg?v=1732004672)
![[Recycled Black / Green Polarized]](http://specseyewear.com/cdn/shop/files/100U233KOS-S762-48_800x_6b2a9dda-506e-47b0-9e5e-ae6ddeb821b1_{width}x.png?v=1732004672)
![[Recycled Black / Green Polarized]](http://specseyewear.com/cdn/shop/files/KOSTIN_FW23_Recycled_Black_Green_Polarized_L2_800x_f4be783c-8371-449d-8752-bcf388d07705_{width}x.jpg?v=1732004672)
![[Recycled Black / Green Polarized]](http://specseyewear.com/cdn/shop/files/100U233KOS-S762-48_A1_800x_dcc094b5-b4b4-48b3-ac98-baddd7ce655f_{width}x.png?v=1732004672)
![[Recycled Black / Green Polarized]](http://specseyewear.com/cdn/shop/files/100U233KOS-S762-48_A2_800x_d3b4618f-f764-450e-9308-5c0d7f4c7c0e_{width}x.png?v=1732004672)
![[Recycled Black / Green Polarized]](http://specseyewear.com/cdn/shop/files/KOSTIN_FW23_Recycled_Black_Green_Polarized_L1_800x_a5eaee4a-4bee-41ad-8ea6-6068991ce69b_{width}x.jpg?v=1732004672)
![[Recycled Black / Green Polarized]](http://specseyewear.com/cdn/shop/files/KOSTIN_FW23_Recycled_Black_Green_Polarized_L3_800x_80570445-fc0e-4269-9d5a-df4062b3aa61_{width}x.jpg?v=1732004672)
![[Recycled Black / Green Polarized]](http://specseyewear.com/cdn/shop/files/KOSTIN_FW23_Recycled_Black_Green_Polarized_L4_800x_e55973f8-7c0e-4667-add9-3c0c01d84009_{width}x.jpg?v=1732004672)
![[Recycled Black / Green Polarized]](http://specseyewear.com/cdn/shop/files/KOSTIN_FW23_Recycled_Black_Green_Polarized_L5_800x_d1eaa992-5c94-429e-a206-60f392fb651f_{width}x.jpg?v=1732004672)
![[Recycled Black / Green Polarized]](http://specseyewear.com/cdn/shop/files/KOSTIN_FW23_Recycled_Black_Green_Polarized_L6_800x_c2e8bd2a-e4ee-41c3-a043-f64228f25570_{width}x.jpg?v=1732004672)
![[Ristretto Tortoise / Smoke]](http://specseyewear.com/cdn/shop/files/100U233KOS-S556-48_800x_d2361e09-1718-4c4e-b6f9-39b0de2107a4_{width}x.png?v=1732004672)
![[Ristretto Tortoise / Smoke]](http://specseyewear.com/cdn/shop/files/KOSTIN_FW23_Ristretto_Tortoise_Smoke_L3_800x_8de71e41-bdee-4cd8-a0cb-06421edd0081_{width}x.jpg?v=1732004672)
![[Ristretto Tortoise / Smoke]](http://specseyewear.com/cdn/shop/files/100U233KOS-S556-48_A1_800x_cac75157-740b-4ac2-b892-404f2f456321_{width}x.png?v=1732004672)
![[Ristretto Tortoise / Smoke]](http://specseyewear.com/cdn/shop/files/100U233KOS-S556-48_A2_800x_950bd8f7-72ff-4757-a0fb-f9ba41284055_{width}x.png?v=1732004672)
![[Ristretto Tortoise / Smoke]](http://specseyewear.com/cdn/shop/files/KOSTIN_FW23_Ristretto_Tortoise_Smoke_L1_800x_30f2ffc1-a772-42b9-a6bd-ed16d20075dc_{width}x.jpg?v=1732004672)
![[Ristretto Tortoise / Smoke]](http://specseyewear.com/cdn/shop/files/KOSTIN_FW23_Ristretto_Tortoise_Smoke_L2_800x_c5d74246-9760-4d9b-9e7b-1a8532f30e58_{width}x.jpg?v=1732004672)
![[Ristretto Tortoise / Smoke]](http://specseyewear.com/cdn/shop/files/KOSTIN_FW23_Ristretto_Tortoise_Smoke_L4_800x_c9a36caa-e0d2-4692-89da-058a85434f4a_{width}x.jpg?v=1732004672)
![[Ristretto Tortoise / Smoke]](http://specseyewear.com/cdn/shop/files/KOSTIN_FW23_Ristretto_Tortoise_Smoke_L5_800x_aa985d61-a6c1-4d7e-b9a4-99094fc0daa6_{width}x.jpg?v=1732004672)
![[Ristretto Tortoise / Smoke]](http://specseyewear.com/cdn/shop/files/KOSTIN_FW23_Ristretto_Tortoise_Smoke_L6_800x_bfc91c5b-037c-4bd1-b00a-d5c262bca870_{width}x.jpg?v=1732004672)
