Removing human or pet hair can be very challenging, especially from fabrics. Hair will often weave itself in to the fabric so it can not be easily removed. I will quickly vacuum the area to remove any loose hair and debris. Assuming this doesn’t effectively remove the majority of the hair I would then get a good clean brush. Take the brush and wipe the cloth seats or carpets, working the hair top down and towards a central point. Sometimes you have to work the brush in multiple different directions to effectively pull the hair out. I’ll vacuum the brush a couple times while doing this brushing to prevent hair from being put back down on the fabric and to keep the brush clean. I vacuum up the hair that has collected and quickly re-vacuum the seats and carpets I just brushed. If any hair remains you can use a lint roller, tape, etc to try and pull it out the few remaining hairs. When you’re done make sure you empty the vacuum’s filter or bag and clean your brush.