All leather motorcycle apparel will be waterproof on the surface in case of rain.
Almost all motorcycle jackets have vents to help with air circulation on warm days.
There is always faux leather, which may be more flexible and also significantly cheapter.
This site (FreshDeals.com) has a great selection of discounted apparel.
2Wheel Apparel & Gear
There are plenty of people who only like leather, and if you're riding a cruiser that would probably be the best choice.
The type of apparel that is best for motorcycle riding is thick and durable fabrics like denim and leather. This is to stop skin abrasions on the pavement if you fall off.
Most jackets come with at least a one-year warranty with some offering up to three years.
A local motorcycle dealer will have a selection of Harley apparel. Harley Davidson also has an online store with a full selection of apparel. Harley apparel can also be found on Amazon.
One can buy ATV apparel at various retailers. One can buy ATV apparel online at retail websites such as MotoSport, Motorcycle Superstore, and DennisKirk.
There are a plethora of websites that offer motorcycle jackets for purchase. For general use, www.amazon.com has basic jackets; while www.revzilla.com specializes in motorcycle apparel.
Not all types of calico fabrics are waterproof, but there are certain waterproof calico fabrics.
Yes, a motorcycle GPS mount should definitely be waterproof. Otherwise, they wouldn't be of much use in wet conditions. This may depend on the brand, so make sure you check before you take it out in the rain.