A phlegmatic character can belie a multitude of feelings, making it difficult for others to pick up on emotional cues. But help is at hand. The GER mood sweater, by design lab Sensoree, is wearable tech that attempts to shed light on the inner feelings of the wearer, without the need for uncomfortable chat.

According to Sensoree, the top makes use of Galvanic Skin Response (GSR) – the way in which the conductance of human skin changes in response to stimuli. When you are calm and at rest, skin GSR is lower than when you are anxious. While GSR has previously been exploited in lie-detectors, Sensoree has harnessed it to turn a funnel-shaped LED collar a range of colours. These are designed to indicate different levels of arousal that the firm has extrapolated to different emotional states ranging from "tranquil – Zen" (green) to "nirvana – ecstatic, blissful" (yellow). Sensoree says the technology works by attaching sensors to the wearer's hands that are then hooked up to the collar creating what it calls a Galvanic Extimacy Responder. But beware, the mood sweater will turn you red-faced if you meet the love of your life – it should glow crimson when you are "nervous – in love".

Having featured in shows and exhibitions around the world, including the Digital Fall 2013 Fashion Show in San Francisco in October and the Futurotextiles exhibition in Romania last month, the mood sweater could soon be hanging in your wardrobe.

One hundred of the hi-tech custom-sized garments are expected to go on sale in March.