This paper introduces intrafaces as a sociomaterial take on user interfaces. Intrafaces enables actions where humans and technology are entangled in the moment and are useful when developing experiences. It invites us to add to the traditional path of user interface design and change perspective on how we comprehend the world. The essence of intrafaces helps us understand how experiences emerge, how human and technology mangles to achieve an action. To design experiences one needs to: 1. consider human and technology as one in action, not as separate entities, and 2. focus on what activity these entities, the social and the technology, together accomplish, and 3. use the notion of agential cut to identify elements and relations involved in the experience. If using intrafaces when designing, the innovation span extends from only considering technology/materiality as the owner of user interfaces to thinking materiality and the social as a collective where intrafaces enable and form the experience.