Gloves reduce the signal level of a touch. The key factor is not the material of the glove but the thickness. Mutual signals are affected more than self signals which is one reason that some controllers use a combination of mutual and self scans. Styli also produce lower signal levels. The key factors for a stylus are the size of the tip and the material. Tethered styli perform better because they are connected to the system ground. A stylus in a gloved hand produces a larger than expected impact on the signal levels because the stylus is a virtual ground and is capacitively coupled to the hand.