What is the fine-grained topic of the following text: Its best features are the durable, nylon, mini, ripstop fabric (donâ€™t let those fishhooks give you any tears), UPF 40+ sun protection, flip-up sun collar for those long sunny days on the boat or pier, and mesh-venting across the back and underarms to make sure the shirt is breathable. Only return the topic.
Features of a fishing shirt